Who said "You gotta stay true to yourself and your Pokémon."?

This quote is attributed to Ash Ketchum.

You gotta stay true to yourself and your Pokémon. - Ash Ketchum

"You gotta stay true to yourself and your Pokémon."

Ash Ketchum

"Gotta catch 'em all!"

"I'm gonna be a Pokémon Master!"

"There's no such thing as a useless Pokémon. It's the trainer that makes the difference."

"The important thing is not how strong a Pokémon is, but the bond between a trainer and their Pokémon."